The Repolarizing Phase of the Action Potential

question 72

Multiple Choice

The repolarizing phase of the action potential

• A)means that the inside of the cell is becoming more positive.
• B)is caused by the movement of sodium (Na+) into the cell.
• C)is caused by the movement of potassium (K+) out of the cell.
• D)is caused by the Na+/K+ pump located in the membrane.

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Definitions:

Olecranon Fossa

A deep notch on the posterior side of the humerus bone, into which the olecranon process of the ulna fits when the arm is extended.

Lateral Epicondyle

A bony prominence on the outer side of the elbow, to which forearm muscles are attached.

Deltoid Tuberosity

A roughened area on the middle of the outer surface of the humerus, where the deltoid muscle attaches.

Obturator Foramen

A large opening in the hip bone formed by the pubic and ischial bones, through which nerves and blood vessels pass.